From my brief play with your demo it's a bit of both.

The toolkit is very small and lacks good definition of elements (both visually in that it lacks contrast, and practically in that I have no idea what is clickable or editable).

The page structure isn't that clear either, where are the column headings? And on my widescreen browser window the isn't a limit on horizontal stretch - I have to play with the browser to find a good width. Also, I can expand code, but how do I shrink/hide it?